Telephone device



June 9 A. NYMAN TELEPHONE DEVICE Filed Sept. 20, 1923 A f/77a)? r INVENTOR z4/Xd/7dl v AITTORNEY afysssas: I @MWW Patented June 28, 1927.

nrursn s'rarss ALEXANDER NYMAN, OF SWISSVALE, FENNSYLVANIA, ASSIGNC-R 'IO WESTINGHOUSE ELECTRIC '86 MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

TELEPHONE nnvron.

Application filed September 20, 1923. Serial No. 663,787.

translated into sound waves or, vice versa,

without distortion.

Another object of my invention is to provide sound reproducing apparatus wherein the vibratory elements are caused to move in a substantially rectilinear direction only, thereby avoiding many of the well-known undesirable effects which arise from lateral thrusts.

I A further object of my invention is to provide apparatus, of the class described above, which is characterized by extreme simplicity of arrangement and by accessibility of the parts requiring adjustment, which can be inexpensively manufactured in quantity and the several parts of which may be easily made by existing automatic -machinery and assembled with a minimum expenditure of time.

According to my invention, I provide a telephone transmitter comprising a solenoid which has a polarizing coil energized by unidirectional currents and signal-current coils for varying the point of maximum field intensityof the polarizing coil. An armature member is disposed withinthe solenoid at the point of maximum field intensity and it is adapted to move in-the axis of the solenoid in accordance with the variations in the position of said point of maximum field intensity. The resulting vibrations of the armature or core member may be translated tional view of a telephone device embodying my invention taken on the line 1-l of Fig. 2, and i In the illustrative embodiment of my in vention shown in the drawings, a magnetic circuit is provided including atubular member 1 and annular end members 2 and 3, all of iron or other magnetizable material. Through the openings 4 and 5 in the end members extends a hollow bobbin 6 on which the coils 7, 8 and 9 are wound. The polarizing coil 7 may be energized from a source 11 of direct current energy through conductors 12 and 13. The series-connected signaling current coils 8 and 9 may be energized by any current which it is desired to translate into sound waves. The source of such current is not shown in the drawing; The relative directions of the windings of the signaling current coils are such that the flux due to one of them is opposed to that due to the other for reasons which will appear more fully hereinafter.

An armature or core member let is disposed within the polarizing coil 7 of the solenoid substantially at the point of maximum field intensity. Preferably, this armature is of a cylindrical form with recesse ends. A link 15, secured to the middle of the diaphragm 16 is fastened to the bottom of the upper recess in any desired way. The diaphragm 16 is disposed immediately over the upper end portion 2 of the casing 1 and is supported at its periphery between resilient washers 17 and 18 which, in turn, are carried by a nonmagnetizable frame 19 secured to the upper portion of the casing 1.

Secured in anydesired way at theapeX of the lower recess in the armature 14., is a rubber thread 21 or other resilient connection. The lower end of the connection is fastened to a screw 20, adjustably mounted in an arm pliii'y the description ot the construction and operation oi my invention, I have omitted from the drawing such portions of the gene'al structures as are well known to those skilled in the ,art.

The operation of the instrumentembodying my invention is basal upon the iactthat a .magnetizable armature member, which is disposed within a magnetizing coil. tends to assume a position wherein it embraces a maximum number oi? lines of force. Iiencc, when the polarizing coil 7 of the solenoid is energized by currents from the source ll of direct current energy, the arn'iature mem ber 14 assumes a position within the coil 7 where it embraces a maximum number of lines of force established by said coil 7. The length of the connecting link 15 is such as to position the armature 1% at the point of maximum field intensity established by the polarizing coil 7 when no current flows in coils 8 and 9. Consequently, under these conditions, the armature member ld re nains in its neutral position and is not affected by the energization of the polarizing coil 7 alone.

Assume for the sake of clearness that the flux established by the direct current in coil 7 is upward and'co-nsider a moment when current in the coil 8 also gives an upward flux. At the top of the arnuiturc 14- the fiux due to coil 7 and that due to coil 8 reini'orce each other at this moment. Therefore, an increase of field strength occurs there. Because the coils 8 and 9 are connected to produce opposed fluxes, the flux due to the coil 9 is downward at this moment and so a diminution of field strength occurs at the lower end of armature 14:. The armature 14; therefore moves upward in order to occupy the point of maximum field intcir sity. On the other hand, when the currents through the series-connected windings Sand 9 are reversed, the point of maximum field intensity is lowered an amountcorresponding to that by which it was just raised. Accordin a force is exerted on the armature lv causing the same to move an equal distance in the opposite direction.

Hence, it can readily be seen that when the signal current coils 8 and 9 are energized by periodic electric energy, such as obtains, for instance, in currents modulated in accordance with sound waves, the armature member 14: is caused to vibrate in accordance with the variations in the energizing currents. The vibratory motion of the armature member 14 being transferred to the dia phra-gms 16 through the connecting linlr. 15, sound waves of corresponding vibration frequency ensue.

VV-hile I have shown and described a specific embodiment of my invention, for the purpose of illustrating the underlying principles theory of operation. thereof, it is apparent that various changes and modifications may be made therein without departing from the spirit of my invention. Idesire, therefore, that only such limitations shall be imposed thereon as are indicated by the appended claims or as are demarded by the prior art.

I claim as my invention:

1. I11 a translating device, a solenoid comprising a polarizing coil, and additionalsignal-current coils, a movable core therefor, and a diaphragm operatively associated with said core, whereby said diaphragm will be vibrated in accordance with such currents as are supplied to said signal current coils.

2. The combination with a solenoid comprising a polarizing coil and signal-current coils for reciprocally varying, along the axis of said solenoid, the point of maximum field intensity, of a vibratabl'y positioned armature adapted to move according to the variation in position of said point of maximum field intensity, and a diaphragm operatively associated with said core.

3. In combination, a solenoid comprising a coil, a source of unidirectional current for energizing said coil, said solenoid also having coils positioned on opposite sides of said first-mentioned coil, a source of signal currents for energizing said coils, said signalcurrent coils being so connected that the fluxes established by them are opposed, an armature member for said solenoid so positioned as to vibrate in accordance with the varying intensity of the signal currents sup plied to said signal-current coils, and a diaphragm operatively associated with said armature member.

at. In combination, a solenoid comprising a coil, a source of unidirectional current for energizing said coil, said solenoid also having coils positioned on opposite sides of said first-mentioned coil, a source of signal currents for energizing said coils, said signalcurrent coils being so connected that the fluxes established by them are opposed, a

diaphragm, an armature member suspended from said diaphragm and positioned within said solenoid whereby it will Vibrate in accordance with the varying intensity of the signal currents traversing said signal-current coils, and means for constraining'the motion of the armature to the axis of the solenoid.

5. In a telephone receiver, a signal-receiving circuit including two coils wound and positioned to produce opposing fluxes, and a flux-responsive device located between said coils said device being arranged for translational movement along an axis common to said coils.

6. In a telephone receiver, a signal-receiving circuit including two coaxial coils spaced apart and wound to produce opposed fluxes in the space between them, a magnetic 111cm;

her in said space and means for polarizing said member said member being arranged for translational movement along an axis common to said coils.

7. In a telephone receiver, a signal-receiving circuit including two coaxial coils spaced apart and Wound to produce opposed fluxes in the space between them, a magnetic member coaxial With said coils and means constraining said member to move along the common axis.

8. In a telephone receiver, a signal-receiving circuit including two coaxial coils spaced apart and Wound to produce opposed fluxes in the space between them, a magnetic member coaxial With said coils, means constraining said member to move along the common axis, means for polarizing said member and a sounding device operatively connected to said member.

9. In a telephone receiver, a signal-receiving circuit including two coaxial coils spaced apart and Wound to produce opposed fluxes in the space between them, a magnetic member coaxial With said coils, means constraining said member to move along the common axis, means for polarizing said member and a sounding device operatively connected to said member, said connection constituting a part of the constraining means.

In testimony whereof, I have hereunto subscribed my name this 14th day of September, 1923.

ALEXANDER NYMAN. 

